Commit 79a5952b authored May 25, 2017 by Krishna Manikandan Committed by Dhaval Patel Feb 19, 2020

fbdev: core: Initialise structure to prevent kernel information leak



The structure fix is initialised before its usage to prevent
kernel information leak during copy_to_user.

Change-Id: Ice4da4c9bd6095a4387e1d16cb20ca474accb9dc
Signed-off-by: Krishna Manikandan <mkrishn@codeaurora.org>

parent 8bbd1df3

drivers/video/fbdev/core/fbmem.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -1087,6 +1087,11 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
		void __user argp = (void __user )arg;
		long ret = 0;

		memset(&var, 0, sizeof(var));
		memset(&fix, 0, sizeof(fix));
		memset(&cmap_from, 0, sizeof(cmap_from));
		memset(&cmap, 0, sizeof(cmap));

		switch (cmd) {
		case FBIOGET_VSCREENINFO:
		lock_fb_info(info);